ID: 972

AQSQID: 060376012

Site Name: Santa Clarita

Added: April 21, 2020, 6:24 p.m.

Updated: March 6, 2021, 4:31 a.m.

Location: Newhall (Newhall), CA

Reporting: True, Located: True

Current AQI: 38.0

Newhall (Newhall) CA, US: 34.3833, -118.5283

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
Feb. 27, 2021, 3 a.m. 9.3 ppb (9) -0.9 ppb (0) N/A 10.0 ppb (10) N/A N/A 33.0 ppb (31) 0.2 ppb (3) N/A 3.6 μg/m3 (16) 31.0
 
Feb. 27, 2021, 2 a.m. 4.7 ppb (5) -0.7 ppb (0) N/A 5.0 ppb (5) N/A N/A 45.0 ppb (42) 0.17 ppb (3) N/A 8.2 μg/m3 (35) 42.0
 
Feb. 27, 2021, 1 a.m. 9.4 ppb (9) -0.5 ppb (0) N/A 10.0 ppb (10) N/A N/A 46.0 ppb (43) 0.21 ppb (3) N/A 12.1 μg/m3 (51) 51.0
 
Feb. 27, 2021, midnight 21.7 ppb (21) 1.6 ppb (2) N/A 20.0 ppb (19) N/A N/A 43.0 ppb (40) 0.35 ppb (4) N/A 10.6 μg/m3 (45) 45.0
 
Feb. 26, 2021, 11 p.m. 16.1 ppb (16) 1.7 ppb (2) N/A 14.0 ppb (14) N/A N/A 47.0 ppb (44) 0.31 ppb (4) N/A 5.2 μg/m3 (22) 44.0
 
Feb. 26, 2021, 10 p.m. 8.7 ppb (9) 0.6 ppb (1) N/A 8.0 ppb (8) N/A N/A 51.0 ppb (48) 0.22 ppb (3) N/A 6.0 μg/m3 (25) 48.0
 
Feb. 26, 2021, 9 p.m. 9.5 ppb (9) 1.2 ppb (2) N/A 8.0 ppb (8) N/A N/A 47.0 ppb (44) 0.21 ppb (3) N/A 5.9 μg/m3 (25) 44.0
 
Feb. 26, 2021, 8 p.m. 1.9 ppb (2) -0.6 ppb (0) N/A 2.0 ppb (2) N/A N/A 49.0 ppb (46) 0.15 ppb (2) N/A 1.2 μg/m3 (5) 46.0
 
Feb. 26, 2021, 7 p.m. 2.8 ppb (3) -0.3 ppb (0) N/A 3.0 ppb (3) N/A N/A 48.0 ppb (45) 0.16 ppb (3) N/A -1.2 μg/m3 (0) 45.0
 
Feb. 26, 2021, 6 p.m. 3.0 ppb (3) -0.3 ppb (0) N/A 3.0 ppb (3) N/A N/A 46.0 ppb (43) 0.17 ppb (3) N/A -2.0 μg/m3 (0) 43.0
 
Feb. 26, 2021, 5 p.m. 8.1 ppb (8) 1.2 ppb (2) N/A 7.0 ppb (7) N/A N/A 40.0 ppb (38) 0.21 ppb (3) N/A -0.7 μg/m3 (0) 38.0
 
Feb. 26, 2021, 4 p.m. 46.7 ppb (45) 21.9 ppb (21) N/A 25.0 ppb (24) N/A N/A 18.0 ppb (17) 0.47 ppb (6) N/A 2.9 μg/m3 (13) 45.0
 
Feb. 26, 2021, 3 p.m. 78.0 ppb (77) 43.8 ppb (42) N/A 34.0 ppb (33) N/A N/A 4.0 ppb (4) 0.6 ppb (7) N/A 6.7 μg/m3 (28) 77.0
 
Feb. 26, 2021, 2 p.m. 35.9 ppb (34) 7.5 ppb (8) N/A 28.0 ppb (27) N/A N/A 3.0 ppb (3) 0.43 ppb (5) N/A 6.7 μg/m3 (28) 34.0
 
Feb. 26, 2021, 1 p.m. 12.1 ppb (12) -0.9 ppb (0) N/A 13.0 ppb (13) N/A N/A 17.0 ppb (16) 0.23 ppb (3) N/A 2.9 μg/m3 (13) 16.0
 
Feb. 26, 2021, noon 10.8 ppb (11) -0.9 ppb (0) N/A 12.0 ppb (12) N/A N/A 19.0 ppb (18) 0.2 ppb (3) N/A 6.2 μg/m3 (26) 26.0
 
Feb. 26, 2021, 11 a.m. 15.6 ppb (15) -0.7 ppb (0) N/A 16.0 ppb (16) N/A N/A 14.0 ppb (13) 0.21 ppb (3) N/A 8.2 μg/m3 (35) 35.0
 
Feb. 26, 2021, 10 a.m. 7.6 ppb (8) -0.9 ppb (0) N/A 9.0 ppb (9) N/A N/A 21.0 ppb (20) 0.19 ppb (3) N/A 3.1 μg/m3 (13) 20.0
 
Feb. 26, 2021, 9 a.m. 9.8 ppb (10) -0.9 ppb (0) N/A 11.0 ppb (11) N/A N/A 18.0 ppb (17) 0.22 ppb (3) N/A 1.7 μg/m3 (8) 17.0
 
Feb. 26, 2021, 8 a.m. 8.2 ppb (8) -1.0 ppb (0) N/A 9.0 ppb (9) N/A N/A 21.0 ppb (20) 0.26 ppb (4) N/A -1.2 μg/m3 (0) 20.0
 
Feb. 26, 2021, 7 a.m. 13.8 ppb (14) -0.9 ppb (0) N/A 15.0 ppb (15) N/A N/A 20.0 ppb (19) 0.29 ppb (4) N/A -3.0 μg/m3 (0) 19.0
 
Feb. 26, 2021, 6 a.m. 8.9 ppb (9) -0.9 ppb (0) N/A 10.0 ppb (10) N/A N/A 26.0 ppb (25) 0.25 ppb (3) N/A 0.1 μg/m3 (1) 25.0
 
Feb. 26, 2021, 5 a.m. 8.0 ppb (8) -0.9 ppb (0) N/A 9.0 ppb (9) N/A N/A 28.0 ppb (26) 0.28 ppb (4) N/A 1.9 μg/m3 (8) 26.0
 
Feb. 26, 2021, 4 a.m. 6.5 ppb (7) -0.9 ppb (0) N/A 7.0 ppb (7) N/A N/A 33.0 ppb (31) 0.21 ppb (3) N/A 0.4 μg/m3 (2) 31.0
 
Feb. 26, 2021, 3 a.m. 5.6 ppb (6) 0.4 ppb (1) N/A 5.0 ppb (5) N/A N/A 37.0 ppb (35) 0.17 ppb (3) N/A -1.0 μg/m3 (0) 35.0
 
Feb. 26, 2021, 2 a.m. 2.3 ppb (3) -0.6 ppb (0) N/A 3.0 ppb (3) N/A N/A 42.0 ppb (39) 0.17 ppb (3) N/A -1.0 μg/m3 (0) 39.0
 
Feb. 26, 2021, 1 a.m. 1.0 ppb (1) -0.8 ppb (0) N/A 2.0 ppb (2) N/A N/A 44.0 ppb (41) 0.14 ppb (2) N/A -0.7 μg/m3 (0) 41.0
 
Feb. 26, 2021, midnight 0.5 ppb (1) -0.8 ppb (0) N/A 1.0 ppb (1) N/A N/A 46.0 ppb (43) 0.14 ppb (2) N/A -0.3 μg/m3 (0) 43.0
 
Feb. 25, 2021, 11 p.m. 0.3 ppb (1) -0.7 ppb (0) N/A 1.0 ppb (1) N/A N/A 47.0 ppb (44) 0.14 ppb (2) N/A 0.6 μg/m3 (3) 44.0
 
Feb. 25, 2021, 10 p.m. 0.3 ppb (1) -0.7 ppb (0) N/A 1.0 ppb (1) N/A N/A 46.0 ppb (43) 0.13 ppb (2) N/A 1.9 μg/m3 (8) 43.0
 
Feb. 25, 2021, 9 p.m. 0.0 ppb (0) -0.8 ppb (0) N/A 1.0 ppb (1) N/A N/A 47.0 ppb (44) 0.13 ppb (2) N/A 3.3 μg/m3 (14) 44.0
 
Feb. 25, 2021, 8 p.m. 0.1 ppb (1) -0.7 ppb (0) N/A 1.0 ppb (1) N/A N/A 47.0 ppb (44) 0.14 ppb (2) N/A 2.1 μg/m3 (9) 44.0
 
Feb. 25, 2021, 7 p.m. 0.0 ppb (0) -0.8 ppb (0) N/A 1.0 ppb (1) N/A N/A 47.0 ppb (44) 0.14 ppb (2) N/A 1.1 μg/m3 (5) 44.0
 
Feb. 25, 2021, 6 p.m. 0.1 ppb (1) -0.8 ppb (0) N/A 1.0 ppb (1) N/A N/A 47.0 ppb (44) 0.15 ppb (2) N/A 14.8 μg/m3 (57) 57.0
 
Feb. 25, 2021, 5 p.m. -0.1 ppb (0) -0.9 ppb (0) N/A 1.0 ppb (1) N/A N/A 47.0 ppb (44) 0.14 ppb (2) N/A 8.9 μg/m3 (38) 44.0
 
Feb. 25, 2021, 4 p.m. 0.5 ppb (1) -0.7 ppb (0) N/A 1.0 ppb (1) N/A N/A 46.0 ppb (43) 0.13 ppb (2) N/A 11.9 μg/m3 (50) 50.0
 
Feb. 25, 2021, 3 p.m. 1.3 ppb (2) -0.3 ppb (0) N/A 2.0 ppb (2) N/A N/A 45.0 ppb (42) 0.13 ppb (2) N/A 10.8 μg/m3 (46) 46.0
 
Feb. 25, 2021, 2 p.m. 0.1 ppb (1) -0.9 ppb (0) N/A 1.0 ppb (1) N/A N/A 47.0 ppb (44) 0.13 ppb (2) N/A 6.4 μg/m3 (27) 44.0
 
Feb. 25, 2021, 1 p.m. -0.3 ppb (0) -1.1 ppb (0) N/A 1.0 ppb (1) N/A N/A 47.0 ppb (44) 0.12 ppb (2) N/A 6.2 μg/m3 (26) 44.0
 
Feb. 25, 2021, noon -0.6 ppb (0) -1.1 ppb (0) N/A 0.0 ppb (0) N/A N/A 48.0 ppb (45) 0.12 ppb (2) N/A 7.4 μg/m3 (31) 45.0
 
Feb. 25, 2021, 11 a.m. -0.7 ppb (0) -1.1 ppb (0) N/A 0.0 ppb (0) N/A N/A 46.0 ppb (43) 0.11 ppb (2) N/A 21.6 μg/m3 (71) 71.0
 
Feb. 25, 2021, 10 a.m. -0.5 ppb (0) -1.1 ppb (0) N/A 1.0 ppb (1) N/A N/A 46.0 ppb (43) 0.11 ppb (2) N/A 20.7 μg/m3 (70) 70.0
 
Feb. 25, 2021, 9 a.m. 0.7 ppb (1) -1.0 ppb (0) N/A 2.0 ppb (2) N/A N/A 43.0 ppb (40) 0.14 ppb (2) N/A 23.3 μg/m3 (75) 75.0
 
Feb. 25, 2021, 8 a.m. 0.7 ppb (1) -0.9 ppb (0) N/A 2.0 ppb (2) N/A N/A 44.0 ppb (41) 0.14 ppb (2) N/A 7.9 μg/m3 (33) 41.0
 
Feb. 25, 2021, 7 a.m. 1.9 ppb (2) -1.1 ppb (0) N/A 3.0 ppb (3) N/A N/A 42.0 ppb (39) 0.15 ppb (2) N/A 9.9 μg/m3 (42) 42.0
 
Feb. 25, 2021, 6 a.m. 6.4 ppb (7) -1.0 ppb (0) N/A 7.0 ppb (7) N/A N/A 30.0 ppb (28) 0.23 ppb (3) N/A 7.7 μg/m3 (33) 33.0
 
Feb. 25, 2021, 5 a.m. 2.6 ppb (3) -1.1 ppb (0) N/A 4.0 ppb (4) N/A N/A 40.0 ppb (38) 0.16 ppb (3) N/A 4.3 μg/m3 (18) 38.0
 
Feb. 25, 2021, 4 a.m. 1.3 ppb (2) -0.9 ppb (0) N/A 2.0 ppb (2) N/A N/A 45.0 ppb (42) 0.13 ppb (2) N/A 2.3 μg/m3 (10) 42.0
 
Feb. 25, 2021, 3 a.m. 2.8 ppb (3) -0.8 ppb (0) N/A 4.0 ppb (4) N/A N/A 44.0 ppb (41) 0.13 ppb (2) N/A 1.4 μg/m3 (6) 41.0
 
Feb. 25, 2021, 2 a.m. 3.8 ppb (4) -0.9 ppb (0) N/A 5.0 ppb (5) N/A N/A 42.0 ppb (39) 0.16 ppb (3) N/A 3.6 μg/m3 (16) 39.0
 
Feb. 25, 2021, 1 a.m. 4.4 ppb (5) -0.3 ppb (0) N/A 5.0 ppb (5) N/A N/A 43.0 ppb (40) 0.17 ppb (3) N/A 6.7 μg/m3 (28) 40.0
 
Feb. 25, 2021, midnight 10.6 ppb (10) 0.1 ppb (1) N/A 11.0 ppb (11) N/A N/A 53.0 ppb (50) 0.25 ppb (3) N/A 9.9 μg/m3 (42) 50.0
 
Feb. 24, 2021, 11 p.m. 16.7 ppb (16) 1.3 ppb (2) N/A 15.0 ppb (15) N/A N/A 58.0 ppb (61) 0.33 ppb (4) N/A 10.2 μg/m3 (43) 61.0
 
Feb. 24, 2021, 10 p.m. 12.2 ppb (12) 0.9 ppb (1) N/A 11.0 ppb (11) N/A N/A 56.0 ppb (55) 0.26 ppb (4) N/A 3.1 μg/m3 (13) 55.0
 
Feb. 24, 2021, 9 p.m. 10.8 ppb (11) 1.6 ppb (2) N/A 9.0 ppb (9) N/A N/A 53.0 ppb (50) 0.22 ppb (3) N/A 0.4 μg/m3 (2) 50.0
 
Feb. 24, 2021, 8 p.m. 15.6 ppb (15) 4.4 ppb (5) N/A 11.0 ppb (11) N/A N/A 47.0 ppb (44) 0.23 ppb (3) N/A 2.9 μg/m3 (13) 44.0
 
Feb. 24, 2021, 7 p.m. 4.8 ppb (5) 0.1 ppb (1) N/A 5.0 ppb (5) N/A N/A 46.0 ppb (43) 0.14 ppb (2) N/A 2.9 μg/m3 (13) 43.0
 
Feb. 24, 2021, 6 p.m. 12.3 ppb (12) 2.6 ppb (3) N/A 10.0 ppb (10) N/A N/A 37.0 ppb (35) 0.21 ppb (3) N/A 3.6 μg/m3 (16) 35.0
 
Feb. 24, 2021, 5 p.m. 26.2 ppb (25) 8.8 ppb (9) N/A 18.0 ppb (17) N/A N/A 25.0 ppb (24) 0.28 ppb (4) N/A 6.2 μg/m3 (26) 26.0
 
Feb. 24, 2021, 4 p.m. 63.9 ppb (62) 35.8 ppb (34) N/A 28.0 ppb (27) N/A N/A 10.0 ppb (10) 0.61 ppb (7) N/A 9.2 μg/m3 (39) 62.0
 
Feb. 24, 2021, 3 p.m. 58.9 ppb (57) 33.7 ppb (32) N/A 25.0 ppb (24) N/A N/A 4.0 ppb (4) 0.76 ppb (10) N/A 8.4 μg/m3 (36) 57.0
 
Feb. 24, 2021, 2 p.m. 27.0 ppb (26) 5.8 ppb (6) N/A 21.0 ppb (20) N/A N/A 2.0 ppb (2) 0.42 ppb (5) N/A 8.7 μg/m3 (37) 37.0
 
Feb. 24, 2021, 1 p.m. 15.6 ppb (15) -0.6 ppb (0) N/A 16.0 ppb (16) N/A N/A 7.0 ppb (7) 0.31 ppb (4) N/A 6.2 μg/m3 (26) 26.0
 
Feb. 24, 2021, noon 13.0 ppb (13) -0.7 ppb (0) N/A 14.0 ppb (14) N/A N/A 9.0 ppb (9) 0.25 ppb (3) N/A 6.5 μg/m3 (28) 28.0
 
Feb. 24, 2021, 11 a.m. 11.8 ppb (12) -0.5 ppb (0) N/A 12.0 ppb (12) N/A N/A 12.0 ppb (12) 0.2 ppb (3) N/A 7.4 μg/m3 (31) 31.0
 
Feb. 24, 2021, 10 a.m. 10.3 ppb (10) -0.9 ppb (0) N/A 11.0 ppb (11) N/A N/A 15.0 ppb (14) 0.22 ppb (3) N/A 4.1 μg/m3 (18) 18.0
 
Feb. 24, 2021, 9 a.m. 10.4 ppb (10) -0.8 ppb (0) N/A 11.0 ppb (11) N/A N/A 16.0 ppb (15) 0.23 ppb (3) N/A 7.4 μg/m3 (31) 31.0
 
Feb. 24, 2021, 8 a.m. 9.8 ppb (10) -0.8 ppb (0) N/A 11.0 ppb (11) N/A N/A 17.0 ppb (16) 0.23 ppb (3) N/A 7.9 μg/m3 (33) 33.0
 
Feb. 24, 2021, 7 a.m. 11.2 ppb (11) -0.9 ppb (0) N/A 12.0 ppb (12) N/A N/A 19.0 ppb (18) 0.25 ppb (3) N/A 7.4 μg/m3 (31) 31.0
 
Feb. 24, 2021, 6 a.m. 12.9 ppb (13) -1.0 ppb (0) N/A 14.0 ppb (14) N/A N/A 21.0 ppb (20) 0.26 ppb (4) N/A 7.2 μg/m3 (31) 31.0
 
Feb. 24, 2021, 5 a.m. 20.9 ppb (20) -0.9 ppb (0) N/A 22.0 ppb (21) N/A N/A 15.0 ppb (14) 0.35 ppb (4) N/A 3.9 μg/m3 (17) 21.0
 
Feb. 24, 2021, 4 a.m. 23.3 ppb (22) -0.9 ppb (0) N/A 24.0 ppb (23) N/A N/A 15.0 ppb (14) 0.39 ppb (5) N/A 5.0 μg/m3 (21) 23.0
 
Feb. 24, 2021, 3 a.m. 16.9 ppb (16) -0.9 ppb (0) N/A 18.0 ppb (17) N/A N/A 20.0 ppb (19) 0.27 ppb (4) N/A 7.1 μg/m3 (30) 30.0
 
Feb. 24, 2021, 2 a.m. 17.8 ppb (17) -0.9 ppb (0) N/A 19.0 ppb (18) N/A N/A 30.0 ppb (28) 0.3 ppb (4) N/A 7.2 μg/m3 (31) 31.0
 
Feb. 24, 2021, 1 a.m. 19.8 ppb (19) -0.7 ppb (0) N/A 21.0 ppb (20) N/A N/A 40.0 ppb (38) 0.34 ppb (4) N/A 5.5 μg/m3 (23) 38.0
 
Feb. 24, 2021, midnight 16.6 ppb (16) 0.7 ppb (1) N/A 16.0 ppb (16) N/A N/A 47.0 ppb (44) 0.31 ppb (4) N/A 6.0 μg/m3 (25) 44.0
 
Feb. 23, 2021, 11 p.m. 9.1 ppb (9) 0.5 ppb (1) N/A 9.0 ppb (9) N/A N/A 45.0 ppb (42) 0.22 ppb (3) N/A 2.1 μg/m3 (9) 42.0
 
Feb. 23, 2021, 10 p.m. 0.6 ppb (1) -0.7 ppb (0) N/A 1.0 ppb (1) N/A N/A 44.0 ppb (41) 0.12 ppb (2) N/A -0.7 μg/m3 (0) 41.0
 
Feb. 23, 2021, 9 p.m. 0.2 ppb (1) -0.8 ppb (0) N/A 1.0 ppb (1) N/A N/A 43.0 ppb (40) 0.12 ppb (2) N/A -0.7 μg/m3 (0) 40.0
 
Feb. 23, 2021, 8 p.m. 0.3 ppb (1) -0.7 ppb (0) N/A 1.0 ppb (1) N/A N/A 42.0 ppb (39) 0.12 ppb (2) N/A -1.0 μg/m3 (0) 39.0
 
Feb. 23, 2021, 7 p.m. -0.2 ppb (0) -0.9 ppb (0) N/A 1.0 ppb (1) N/A N/A 42.0 ppb (39) 0.12 ppb (2) N/A -1.8 μg/m3 (0) 39.0
 
Feb. 23, 2021, 6 p.m. 6.3 ppb (6) 1.2 ppb (2) N/A 5.0 ppb (5) N/A N/A 36.0 ppb (34) 0.17 ppb (3) N/A -0.5 μg/m3 (0) 34.0
 
Feb. 23, 2021, 5 p.m. 18.4 ppb (18) 6.1 ppb (6) N/A 12.0 ppb (12) N/A N/A 25.0 ppb (24) 0.27 ppb (4) N/A 3.4 μg/m3 (15) 24.0
 
Feb. 23, 2021, 4 p.m. 61.2 ppb (59) 33.9 ppb (32) N/A 27.0 ppb (26) N/A N/A 9.0 ppb (9) 0.52 ppb (6) N/A 4.1 μg/m3 (18) 59.0
 
Feb. 23, 2021, 3 p.m. 48.5 ppb (46) 25.2 ppb (24) N/A 23.0 ppb (22) N/A N/A 6.0 ppb (6) 0.55 ppb (7) N/A 4.6 μg/m3 (20) 46.0
 
Feb. 23, 2021, 2 p.m. 35.6 ppb (34) 14.2 ppb (14) N/A 21.0 ppb (20) N/A N/A 3.0 ppb (3) 0.66 ppb (8) N/A 2.6 μg/m3 (11) 34.0
 
Feb. 23, 2021, 1 p.m. 12.3 ppb (12) -0.9 ppb (0) N/A 13.0 ppb (13) N/A N/A 10.0 ppb (10) 0.24 ppb (3) N/A 0.9 μg/m3 (4) 13.0
 
Feb. 23, 2021, noon 7.5 ppb (8) -1.0 ppb (0) N/A 8.0 ppb (8) N/A N/A 16.0 ppb (15) 0.18 ppb (3) N/A 0.9 μg/m3 (4) 15.0
 
Feb. 23, 2021, 11 a.m. 5.3 ppb (5) -1.0 ppb (0) N/A 6.0 ppb (6) N/A N/A 19.0 ppb (18) 0.15 ppb (2) N/A 0.4 μg/m3 (2) 18.0
 
Feb. 23, 2021, 10 a.m. 5.9 ppb (6) -0.9 ppb (0) N/A 7.0 ppb (7) N/A N/A 18.0 ppb (17) 0.15 ppb (2) N/A 1.4 μg/m3 (6) 17.0
 
Feb. 23, 2021, 9 a.m. 8.2 ppb (8) -1.1 ppb (0) N/A 9.0 ppb (9) N/A N/A 17.0 ppb (16) 0.17 ppb (3) N/A 0.1 μg/m3 (1) 16.0
 
Feb. 23, 2021, 8 a.m. 7.8 ppb (8) -1.0 ppb (0) N/A 9.0 ppb (9) N/A N/A 18.0 ppb (17) 0.19 ppb (3) N/A 2.4 μg/m3 (10) 17.0
 
Feb. 23, 2021, 7 a.m. 11.5 ppb (11) -1.0 ppb (0) N/A 13.0 ppb (13) N/A N/A 15.0 ppb (14) 0.23 ppb (3) N/A 2.9 μg/m3 (13) 14.0
 
Feb. 23, 2021, 6 a.m. 11.2 ppb (11) -1.0 ppb (0) N/A 12.0 ppb (12) N/A N/A 15.0 ppb (14) 0.23 ppb (3) N/A 3.9 μg/m3 (17) 17.0
 
Feb. 23, 2021, 5 a.m. 12.8 ppb (13) -1.0 ppb (0) N/A 14.0 ppb (14) N/A N/A 16.0 ppb (15) 0.25 ppb (3) N/A 6.7 μg/m3 (28) 28.0
 
Feb. 23, 2021, 4 a.m. 13.1 ppb (13) -0.6 ppb (0) N/A 14.0 ppb (14) N/A N/A 22.0 ppb (21) 0.27 ppb (4) N/A 5.2 μg/m3 (22) 22.0
 
Feb. 23, 2021, 3 a.m. 5.5 ppb (6) -0.3 ppb (0) N/A 6.0 ppb (6) N/A N/A 32.0 ppb (30) 0.17 ppb (3) N/A 1.9 μg/m3 (8) 30.0
 
Feb. 23, 2021, 2 a.m. 2.6 ppb (3) -0.7 ppb (0) N/A 3.0 ppb (3) N/A N/A 38.0 ppb (36) 0.14 ppb (2) N/A -0.7 μg/m3 (0) 36.0
 
Feb. 23, 2021, 1 a.m. 0.6 ppb (1) -1.0 ppb (0) N/A 2.0 ppb (2) N/A N/A 43.0 ppb (40) 0.12 ppb (2) N/A -0.2 μg/m3 (0) 40.0
 
Feb. 23, 2021, midnight 0.1 ppb (1) -1.0 ppb (0) N/A 1.0 ppb (1) N/A N/A 43.0 ppb (40) 0.12 ppb (2) N/A -0.7 μg/m3 (0) 40.0
 
Feb. 22, 2021, 11 p.m. 0.2 ppb (1) -0.8 ppb (0) N/A 1.0 ppb (1) N/A N/A 43.0 ppb (40) 0.12 ppb (2) N/A -1.2 μg/m3 (0) 40.0
 
Feb. 22, 2021, 10 p.m. 0.1 ppb (1) -0.8 ppb (0) N/A 1.0 ppb (1) N/A N/A 43.0 ppb (40) 0.13 ppb (2) N/A -2.7 μg/m3 (0) 40.0
 
Feb. 22, 2021, 9 p.m. 0.1 ppb (1) -0.8 ppb (0) N/A 1.0 ppb (1) N/A N/A 42.0 ppb (39) 0.13 ppb (2) N/A -0.5 μg/m3 (0) 39.0
 
Feb. 22, 2021, 8 p.m. 0.2 ppb (1) -0.7 ppb (0) N/A 1.0 ppb (1) N/A N/A 42.0 ppb (39) 0.12 ppb (2) N/A 5.5 μg/m3 (23) 39.0
 
Feb. 22, 2021, 7 p.m. 0.4 ppb (1) -0.7 ppb (0) N/A 1.0 ppb (1) N/A N/A 41.0 ppb (38) 0.12 ppb (2) N/A 3.6 μg/m3 (16) 38.0
 
Feb. 22, 2021, 6 p.m. 0.7 ppb (1) -0.6 ppb (0) N/A 1.0 ppb (1) N/A N/A 40.0 ppb (38) 0.13 ppb (2) N/A 3.4 μg/m3 (15) 38.0
 
Feb. 22, 2021, 5 p.m. 0.4 ppb (1) -0.7 ppb (0) N/A 1.0 ppb (1) N/A N/A 41.0 ppb (38) 0.13 ppb (2) N/A 4.9 μg/m3 (21) 38.0
 
Feb. 22, 2021, 4 p.m. 0.9 ppb (1) -0.5 ppb (0) N/A 1.0 ppb (1) N/A N/A 40.0 ppb (38) 0.13 ppb (2) N/A 2.9 μg/m3 (13) 38.0
 
Feb. 22, 2021, 3 p.m. 2.9 ppb (3) -0.2 ppb (0) N/A 3.0 ppb (3) N/A N/A 37.0 ppb (35) 0.21 ppb (3) N/A 2.1 μg/m3 (9) 35.0
 
Feb. 22, 2021, 2 p.m. 3.0 ppb (3) -0.5 ppb (0) N/A 4.0 ppb (4) N/A N/A 37.0 ppb (35) 0.15 ppb (2) N/A -0.7 μg/m3 (0) 35.0
 
Feb. 22, 2021, 1 p.m. 2.2 ppb (3) -0.7 ppb (0) N/A 3.0 ppb (3) N/A N/A 37.0 ppb (35) 0.14 ppb (2) N/A -0.2 μg/m3 (0) 35.0
 
Feb. 22, 2021, noon -0.5 ppb (0) -1.1 ppb (0) N/A 1.0 ppb (1) N/A N/A 41.0 ppb (38) 0.13 ppb (2) N/A 3.6 μg/m3 (16) 38.0
 
Feb. 22, 2021, 11 a.m. -0.3 ppb (0) -1.1 ppb (0) N/A 1.0 ppb (1) N/A N/A 41.0 ppb (38) 0.12 ppb (2) N/A -1.2 μg/m3 (0) 38.0
 
Feb. 22, 2021, 10 a.m. -0.5 ppb (0) -1.1 ppb (0) N/A 1.0 ppb (1) N/A N/A 42.0 ppb (39) 0.12 ppb (2) N/A -3.4 μg/m3 (0) 39.0
 
Feb. 22, 2021, 9 a.m. 0.5 ppb (1) -1.1 ppb (0) N/A 2.0 ppb (2) N/A N/A 39.0 ppb (37) 0.12 ppb (2) N/A 0.4 μg/m3 (2) 37.0
 
Feb. 22, 2021, 8 a.m. 0.7 ppb (1) -1.0 ppb (0) N/A 2.0 ppb (2) N/A N/A 39.0 ppb (37) 0.14 ppb (2) N/A 0.7 μg/m3 (3) 37.0
 
Feb. 22, 2021, 7 a.m. 1.7 ppb (2) -1.0 ppb (0) N/A 3.0 ppb (3) N/A N/A 38.0 ppb (36) 0.15 ppb (2) N/A -0.8 μg/m3 (0) 36.0
 
Feb. 22, 2021, 6 a.m. 3.9 ppb (4) -1.0 ppb (0) N/A 5.0 ppb (5) N/A N/A 34.0 ppb (32) 0.18 ppb (3) N/A -1.2 μg/m3 (0) 32.0
 
Feb. 22, 2021, 5 a.m. 3.4 ppb (4) -1.0 ppb (0) N/A 4.0 ppb (4) N/A N/A 37.0 ppb (35) 0.17 ppb (3) N/A -0.7 μg/m3 (0) 35.0
 
Feb. 22, 2021, 4 a.m. 4.3 ppb (5) -1.0 ppb (0) N/A 5.0 ppb (5) N/A N/A 37.0 ppb (35) 0.18 ppb (3) N/A 1.9 μg/m3 (8) 35.0
 
Feb. 22, 2021, 3 a.m. 5.1 ppb (5) -0.7 ppb (0) N/A 6.0 ppb (6) N/A N/A 36.0 ppb (34) 0.19 ppb (3) N/A 3.3 μg/m3 (14) 34.0
 
Feb. 22, 2021, 2 a.m. 3.4 ppb (4) -0.6 ppb (0) N/A 4.0 ppb (4) N/A N/A 39.0 ppb (37) 0.17 ppb (3) N/A -2.2 μg/m3 (0) 37.0
 
Feb. 22, 2021, 1 a.m. -0.1 ppb (0) -1.0 ppb (0) N/A 1.0 ppb (1) N/A N/A 45.0 ppb (42) 0.13 ppb (2) N/A -2.4 μg/m3 (0) 42.0
 
Feb. 22, 2021, midnight -0.3 ppb (0) -1.0 ppb (0) N/A 1.0 ppb (1) N/A N/A 46.0 ppb (43) 0.12 ppb (2) N/A -2.7 μg/m3 (0) 43.0
 
Feb. 21, 2021, 11 p.m. -0.4 ppb (0) -1.0 ppb (0) N/A 1.0 ppb (1) N/A N/A 47.0 ppb (44) 0.12 ppb (2) N/A -2.4 μg/m3 (0) 44.0
 
Feb. 21, 2021, 10 p.m. -0.3 ppb (0) -0.9 ppb (0) N/A 1.0 ppb (1) N/A N/A 46.0 ppb (43) 0.12 ppb (2) N/A 0.4 μg/m3 (2) 43.0
 
Feb. 21, 2021, 9 p.m. -0.4 ppb (0) -0.9 ppb (0) N/A 1.0 ppb (1) N/A N/A 46.0 ppb (43) 0.12 ppb (2) N/A 0.0 μg/m3 (0) 43.0
 
Feb. 21, 2021, 8 p.m. -0.3 ppb (0) -0.9 ppb (0) N/A 1.0 ppb (1) N/A N/A 45.0 ppb (42) 0.11 ppb (2) N/A 0.4 μg/m3 (2) 42.0
 
Feb. 21, 2021, 7 p.m. -0.4 ppb (0) -0.9 ppb (0) N/A 1.0 ppb (1) N/A N/A 45.0 ppb (42) 0.12 ppb (2) N/A 0.1 μg/m3 (1) 42.0
 
Feb. 21, 2021, 6 p.m. 0.0 ppb (0) -0.8 ppb (0) N/A 1.0 ppb (1) N/A N/A 43.0 ppb (40) 0.1 ppb (2) N/A 0.4 μg/m3 (2) 40.0
 
Feb. 21, 2021, 5 p.m. -0.1 ppb (0) -0.8 ppb (0) N/A 1.0 ppb (1) N/A N/A 43.0 ppb (40) 0.11 ppb (2) N/A 0.2 μg/m3 (1) 40.0
 
Feb. 21, 2021, 4 p.m. 0.9 ppb (1) -0.6 ppb (0) N/A 1.0 ppb (1) N/A N/A 39.0 ppb (37) 0.12 ppb (2) N/A -1.2 μg/m3 (0) 37.0
 
Feb. 21, 2021, 3 p.m. 3.1 ppb (3) -0.5 ppb (0) N/A 4.0 ppb (4) N/A N/A 35.0 ppb (33) 0.16 ppb (3) N/A 0.0 μg/m3 (0) 33.0
 
Feb. 21, 2021, 2 p.m. 3.2 ppb (4) -1.0 ppb (0) N/A 4.0 ppb (4) N/A N/A 34.0 ppb (32) 0.14 ppb (2) N/A 1.9 μg/m3 (8) 32.0
 
Feb. 21, 2021, 1 p.m. 4.1 ppb (4) -0.9 ppb (0) N/A 5.0 ppb (5) N/A N/A 29.0 ppb (27) 0.16 ppb (3) N/A 3.4 μg/m3 (15) 27.0
 
Feb. 21, 2021, noon 5.5 ppb (6) -0.9 ppb (0) N/A 6.0 ppb (6) N/A N/A 26.0 ppb (25) 0.18 ppb (3) N/A 1.9 μg/m3 (8) 25.0
 
Feb. 21, 2021, 11 a.m. 9.2 ppb (9) -0.9 ppb (0) N/A 10.0 ppb (10) N/A N/A 16.0 ppb (15) 0.24 ppb (3) N/A 2.2 μg/m3 (10) 15.0
 
Feb. 21, 2021, 10 a.m. 11.0 ppb (11) -0.8 ppb (0) N/A 12.0 ppb (12) N/A N/A 15.0 ppb (14) 0.28 ppb (4) N/A 7.7 μg/m3 (33) 33.0
 
Feb. 21, 2021, 9 a.m. 14.8 ppb (14) -0.6 ppb (0) N/A 15.0 ppb (15) N/A N/A 10.0 ppb (10) 0.35 ppb (4) N/A 8.7 μg/m3 (37) 37.0
 
Feb. 21, 2021, 8 a.m. 12.3 ppb (12) -0.6 ppb (0) N/A 13.0 ppb (13) N/A N/A 13.0 ppb (13) 0.37 ppb (5) N/A 4.4 μg/m3 (19) 19.0
 
Feb. 21, 2021, 7 a.m. 9.2 ppb (9) -0.9 ppb (0) N/A 10.0 ppb (10) N/A N/A 18.0 ppb (17) 0.29 ppb (4) N/A 6.5 μg/m3 (28) 28.0
 
Feb. 21, 2021, 6 a.m. 10.5 ppb (10) -0.9 ppb (0) N/A 11.0 ppb (11) N/A N/A 18.0 ppb (17) 0.31 ppb (4) N/A 9.9 μg/m3 (42) 42.0
 
Feb. 21, 2021, 5 a.m. 8.4 ppb (8) -1.0 ppb (0) N/A 9.0 ppb (9) N/A N/A 22.0 ppb (21) 0.29 ppb (4) N/A 7.2 μg/m3 (31) 31.0
 
Feb. 21, 2021, 4 a.m. 4.1 ppb (4) -1.0 ppb (0) N/A 5.0 ppb (5) N/A N/A 35.0 ppb (33) 0.19 ppb (3) N/A 4.5 μg/m3 (19) 33.0
 
Feb. 21, 2021, 3 a.m. 3.1 ppb (3) -0.9 ppb (0) N/A 4.0 ppb (4) N/A N/A 40.0 ppb (38) 0.18 ppb (3) N/A 4.5 μg/m3 (19) 38.0
 
Feb. 21, 2021, 2 a.m. 1.9 ppb (2) -0.9 ppb (0) N/A 3.0 ppb (3) N/A N/A 42.0 ppb (39) 0.16 ppb (3) N/A 9.4 μg/m3 (40) 40.0
 
Feb. 21, 2021, 1 a.m. 1.0 ppb (1) -0.9 ppb (0) N/A 2.0 ppb (2) N/A N/A 43.0 ppb (40) 0.14 ppb (2) N/A 10.4 μg/m3 (44) 44.0
 
Feb. 21, 2021, midnight 1.3 ppb (2) -0.6 ppb (0) N/A 2.0 ppb (2) N/A N/A 43.0 ppb (40) 0.13 ppb (2) N/A 5.5 μg/m3 (23) 40.0
 
Feb. 20, 2021, 11 p.m. 0.4 ppb (1) -0.7 ppb (0) N/A 1.0 ppb (1) N/A N/A 44.0 ppb (41) 0.11 ppb (2) N/A 7.2 μg/m3 (31) 41.0
 
Feb. 20, 2021, 10 p.m. 0.0 ppb (0) -0.7 ppb (0) N/A 1.0 ppb (1) N/A N/A 43.0 ppb (40) 0.11 ppb (2) N/A 7.5 μg/m3 (32) 40.0
 
Feb. 20, 2021, 9 p.m. 0.0 ppb (0) -0.8 ppb (0) N/A 1.0 ppb (1) N/A N/A 43.0 ppb (40) 0.1 ppb (2) N/A 3.1 μg/m3 (13) 40.0
 
Feb. 20, 2021, 8 p.m. 0.1 ppb (1) -0.8 ppb (0) N/A 1.0 ppb (1) N/A N/A 42.0 ppb (39) 0.11 ppb (2) N/A 4.3 μg/m3 (18) 39.0
 
Feb. 20, 2021, 7 p.m. 0.2 ppb (1) -0.7 ppb (0) N/A 1.0 ppb (1) N/A N/A 41.0 ppb (38) 0.11 ppb (2) N/A 5.5 μg/m3 (23) 38.0
 
Feb. 20, 2021, 6 p.m. 0.2 ppb (1) -0.7 ppb (0) N/A 1.0 ppb (1) N/A N/A 41.0 ppb (38) 0.1 ppb (2) N/A 4.5 μg/m3 (19) 38.0
 
Feb. 20, 2021, 5 p.m. 0.5 ppb (1) -0.7 ppb (0) N/A 1.0 ppb (1) N/A N/A 36.0 ppb (34) 0.11 ppb (2) N/A 7.0 μg/m3 (30) 34.0
 
Feb. 20, 2021, 4 p.m. 1.6 ppb (2) -0.4 ppb (0) N/A 2.0 ppb (2) N/A N/A 33.0 ppb (31) 0.13 ppb (2) N/A 8.2 μg/m3 (35) 35.0
 
Feb. 20, 2021, 3 p.m. 16.5 ppb (16) 4.1 ppb (4) N/A 12.0 ppb (12) N/A N/A 13.0 ppb (13) 0.31 ppb (4) N/A 4.1 μg/m3 (18) 18.0
 
Feb. 20, 2021, 2 p.m. 11.0 ppb (11) 0.3 ppb (1) N/A 11.0 ppb (11) N/A N/A 11.0 ppb (11) 0.19 ppb (3) N/A 1.9 μg/m3 (8) 11.0
 
Feb. 20, 2021, 1 p.m. 7.9 ppb (8) -0.3 ppb (0) N/A 8.0 ppb (8) N/A N/A 11.0 ppb (11) 0.22 ppb (3) N/A 1.4 μg/m3 (6) 11.0
 
Feb. 20, 2021, noon 5.7 ppb (6) -0.8 ppb (0) N/A 7.0 ppb (7) N/A N/A 14.0 ppb (13) 0.15 ppb (2) N/A 2.7 μg/m3 (12) 13.0
 
Feb. 20, 2021, 11 a.m. 6.2 ppb (6) -0.9 ppb (0) N/A 7.0 ppb (7) N/A N/A 10.0 ppb (10) 0.17 ppb (3) N/A 3.1 μg/m3 (13) 13.0
 
Feb. 20, 2021, 10 a.m. 6.2 ppb (6) -0.9 ppb (0) N/A 7.0 ppb (7) N/A N/A 12.0 ppb (12) 0.16 ppb (3) N/A 3.1 μg/m3 (13) 13.0
 
Feb. 20, 2021, 9 a.m. 6.1 ppb (6) -0.9 ppb (0) N/A 7.0 ppb (7) N/A N/A 12.0 ppb (12) 0.17 ppb (3) N/A 5.2 μg/m3 (22) 22.0
 
Feb. 20, 2021, 8 a.m. 5.8 ppb (6) -0.9 ppb (0) N/A 7.0 ppb (7) N/A N/A 13.0 ppb (13) 0.16 ppb (3) N/A 2.4 μg/m3 (10) 13.0
 
Feb. 20, 2021, 7 a.m. 6.9 ppb (7) -0.9 ppb (0) N/A 8.0 ppb (8) N/A N/A 15.0 ppb (14) 0.17 ppb (3) N/A 2.1 μg/m3 (9) 14.0
 
Feb. 20, 2021, 6 a.m. 6.8 ppb (7) -1.0 ppb (0) N/A 8.0 ppb (8) N/A N/A 17.0 ppb (16) 0.17 ppb (3) N/A 4.5 μg/m3 (19) 19.0
 
Feb. 20, 2021, 5 a.m. 9.5 ppb (9) -1.0 ppb (0) N/A 10.0 ppb (10) N/A N/A 17.0 ppb (16) 0.21 ppb (3) N/A 3.4 μg/m3 (15) 16.0
 
Feb. 20, 2021, 4 a.m. 9.6 ppb (10) -1.0 ppb (0) N/A 11.0 ppb (11) N/A N/A 20.0 ppb (19) 0.24 ppb (3) N/A 2.9 μg/m3 (13) 19.0